19008990162 has 18 divisors (see below), whose sum is σ = 41187412773. Its totient is φ = 6336135072.

The previous prime is 19008990139. The next prime is 19008990197. The reversal of 19008990162 is 26109980091.

It can be written as a sum of positive squares in 2 ways, for example, as 16782943401 + 2226046761 = 129549^2 + 47181^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=97491.

It is a super-2 number, since 2×19008990162² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 568698 + ... + 601194.

Almost surely, 2^19008990162 is an apocalyptic number.

19008990162 is an abundant number, since it is smaller than the sum of its proper divisors (22178422611).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19008990162 is an frugal number, since it uses more digits than its factorization.

19008990162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65002 (or 32502 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 45.

The spelling of 19008990162 in words is "nineteen billion, eight million, nine hundred ninety thousand, one hundred sixty-two".